DE3470467D1 - Method of making screws and dies therefor - Google Patents

Method of making screws and dies therefor

Info

Publication number
DE3470467D1
DE3470467D1 DE8484110615T DE3470467T DE3470467D1 DE 3470467 D1 DE3470467 D1 DE 3470467D1 DE 8484110615 T DE8484110615 T DE 8484110615T DE 3470467 T DE3470467 T DE 3470467T DE 3470467 D1 DE3470467 D1 DE 3470467D1
Authority
DE
Germany
Prior art keywords
dies
blank
section
rolled
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8484110615T
Other languages
German (de)
Inventor
Rudolf Webendorfer
Hubert Taubert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Conti Fasteners AG
Original Assignee
Conti Fasteners AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conti Fasteners AG filed Critical Conti Fasteners AG
Priority to DE8484110615T priority Critical patent/DE3470467D1/en
Application granted granted Critical
Publication of DE3470467D1 publication Critical patent/DE3470467D1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/025—Rolling locking screws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Catalysts (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Ropes Or Cables (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

Method and dies for threading a screw comprises providing a screw blank with a portion of its length of lobular cross section and an adjacent portion of the blank of circular cross section. The blank is rolled between roll dies so as to roll the thread on the circular portion and simultaneously roll the thread at the lobes only on the lobular portion. Thereafter, the blank is rolled to additional regions of the dies wherein the thread is rolled to form on the lobular section, while the cylindrical section passes through regions of clearance or relief on the dies.
DE8484110615T 1983-09-09 1984-09-06 Method of making screws and dies therefor Expired DE3470467D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484110615T DE3470467D1 (en) 1983-09-09 1984-09-06 Method of making screws and dies therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833332570 DE3332570A1 (en) 1983-09-09 1983-09-09 METHOD FOR PRODUCING SELF-SHAPING AND SELF-LOCKING SCREWS WITH ADDITIONAL SEALING AND / OR SETTING PROPERTIES
DE8484110615T DE3470467D1 (en) 1983-09-09 1984-09-06 Method of making screws and dies therefor

Publications (1)

Publication Number Publication Date
DE3470467D1 true DE3470467D1 (en) 1988-05-26

Family

ID=6208646

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19833332570 Withdrawn DE3332570A1 (en) 1983-09-09 1983-09-09 METHOD FOR PRODUCING SELF-SHAPING AND SELF-LOCKING SCREWS WITH ADDITIONAL SEALING AND / OR SETTING PROPERTIES
DE8484110615T Expired DE3470467D1 (en) 1983-09-09 1984-09-06 Method of making screws and dies therefor

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19833332570 Withdrawn DE3332570A1 (en) 1983-09-09 1983-09-09 METHOD FOR PRODUCING SELF-SHAPING AND SELF-LOCKING SCREWS WITH ADDITIONAL SEALING AND / OR SETTING PROPERTIES

Country Status (8)

Country Link
US (1) US4561277A (en)
EP (1) EP0139195B1 (en)
JP (1) JPS6072631A (en)
AT (1) ATE33568T1 (en)
AU (1) AU3282784A (en)
BR (1) BR8404499A (en)
DE (2) DE3332570A1 (en)
ES (1) ES535744A0 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015771A1 (en) * 1990-05-16 1991-11-28 Sfs Stadler Holding Ag Thread-forming screw system - has adhesive coating over at least part of its thread, with non-round cross section
US5943904A (en) * 1995-03-08 1999-08-31 Ingersoll Cutting Tool Company Thread-rolling die
JP3046746B2 (en) * 1995-06-14 2000-05-29 ミネベア株式会社 Screw and screw manufacturing method
US6089806A (en) * 1999-01-25 2000-07-18 Conti Fasteners Blank for self-tapping fastener
JP3604325B2 (en) * 2000-05-26 2004-12-22 オーエスジー株式会社 Rolling dies for rod-end screws
US20050200136A1 (en) * 2001-02-15 2005-09-15 Integral Technologies, Inc. Low cost hardware manufactured from conductive loaded resin-based materials
US20050200041A1 (en) * 2001-02-15 2005-09-15 Integral Technologies, Inc. Low cost hardware manufactured from conductive loaded resin-based materials
SE522125C2 (en) * 2001-05-22 2004-01-13 Sandvik Ab Threaded tool with annular comb
US6494656B1 (en) * 2001-09-13 2002-12-17 Conti Fasteners Ag Self-tapping screw, blank and method for joining thin workpieces and production method for the same
DE102005056119A1 (en) * 2005-11-27 2007-05-24 Zipprich, Holger, Dipl.-Ing. Screw for jaw-bone orthopedic application, has thread varied in its inclination or geometrical form in thread area, where geometrical variation is appeared based on conically running thread core or based on conical screw
DE102007004970A1 (en) 2007-01-26 2008-08-07 Eska Automotive Gmbh Thread grooving screw, has circular thread section connected at trilobular thread section, where diameter of cladding circle of trilobular thread section is formed larger than diameter of circular thread section
ITPV20100004A1 (en) * 2010-03-11 2011-09-12 Carlo Vittorio Sala ANTI-DRIED AND RELATIVE THREAD MOLDING MATRIX, FOR THE FORMATION OF THE THREAD IN THE MADREVITE, THROUGH A MECHANICAL LAMINATION TECHNIQUE WITHOUT THE REMOVAL OF MATERIAL
DE102010043589A1 (en) * 2010-11-08 2012-05-10 Baier & Michels Gmbh & Co. Kg Thread-generating nut, blank for producing the nut and screw connection of nut and bolt
DE102011078686A1 (en) * 2011-07-05 2012-04-05 Baier & Michels Gmbh & Co. Kg Self-tapping screw has tapping threaded portion and basic threaded portion by which increase of effective diameter and/or outer diameter over basic region remains constant, so that basic threaded section from screw tip is conic extended
AT12729U3 (en) * 2012-04-24 2013-09-15 Nedschroef Fraulautern Gmbh screw
DE202012009121U1 (en) 2012-09-21 2012-11-12 Markus Rensburg Trilobular screw
DE102014014086A1 (en) * 2014-09-23 2016-03-24 Gm Global Technology Operations, Llc Screw and screw arrangement
DE102017103073B4 (en) 2017-02-15 2022-08-11 Hieber & Maier GmbH Tool for thread rolling a thread-forming screw, method for producing a hole-forming and/or thread-forming screw, and a thread-forming and/or hole-forming screw

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA794096A (en) * 1968-09-10 Harvey F. Phipard, Jr. Apparatus for manufacturing self-tapping threaded fasteners
US3180126A (en) * 1962-11-14 1965-04-27 Textron Ind Inc Self-tapping screw and method of manufacture
NL6408951A (en) * 1965-02-08 1966-02-07
US3530920A (en) * 1968-05-23 1970-09-29 Usm Corp Self-locking threaded fasteners
US3681963A (en) * 1970-01-19 1972-08-08 Res Eng & Mfg Self-thread forming threaded fasteners and method and apparatus for making the same
US3772720A (en) * 1970-04-11 1973-11-20 Res Engine Manuf Inc Method for making a thread forming member
US3875780A (en) * 1974-01-03 1975-04-08 Rockford Headed Products Method of making a thread forming screw
US4040328A (en) * 1976-03-10 1977-08-09 Research Engineering & Manufacturing, Inc. Thread-forming fastener having dual lobulation and dies for making the same
US4194430A (en) * 1978-05-05 1980-03-25 Research Engineering & Manufacturing, Inc. Thread-forming screw with step taper
US4170050A (en) * 1978-06-07 1979-10-09 Groov-Pin Corporation Method of making lobular internally and externally threaded insert
US4315340A (en) * 1978-08-17 1982-02-16 Veldman Donald R Method and apparatus for making a self-thread creating fastener
DE2929008A1 (en) * 1979-07-18 1981-02-05 Groov Pin Corp Self-tapping headless lobular insert forming method - forms longitudinally spaced chamfers or bevels on rod by orbital or helicoid movement of latter, using rod side surfaces as guide
US4353233A (en) * 1981-01-29 1982-10-12 Amca International Corporation Dies for making thread-forming fasteners

Also Published As

Publication number Publication date
AU3282784A (en) 1985-03-14
US4561277A (en) 1985-12-31
ES8505271A1 (en) 1985-05-16
DE3332570A1 (en) 1985-03-28
EP0139195A1 (en) 1985-05-02
JPS6072631A (en) 1985-04-24
ATE33568T1 (en) 1988-05-15
ES535744A0 (en) 1985-05-16
BR8404499A (en) 1985-08-06
EP0139195B1 (en) 1988-04-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition